On-line detection device for non-contact measuring hole and use method thereof

Abstract

The invention discloses an on-line detection device for a non-contact measuring hole and a use method thereof, and belongs to the technical field of on-line detection. The device is structurally characterized by comprising a clamp, a camera, a clamping ring, a support, a connecting rod, a laser generator and an illumination compensator; and the on-line detection device is installed on a machine tool spindle, calibration is conducted at different heights through standard hole samples, a relational expression of a measurement error compensation value and the height of a standard hole is obtained, and geometric parameters of a to-be-detected hole of a part are solved by combining the image recognition technology and an error compensation formula. According to the on-line detection device for the non-contact measuring hole and the use method thereof, non-contact on-line detection of a large number of hole systems can be realized, all geometric information of holes is obtained, probe collision risks and repeated clamping errors caused by contact measurement are eliminated, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of inspection and detection, in particular to an on-line detection device for a non-contact measuring hole and a use method thereof. Background technique [0002] With the rapid development of aviation manufacturing technology, the size of modern aircraft is getting bigger and bigger, and the shape is more and more complex. In order to improve the aerodynamic performance of the aircraft under the premise of reducing weight, more and more large composite skins are used as aircraft shape parts. The composite material skin and the metal structure inside the aircraft are first assembled together through positioning holes, and then workers use portable drills to make a large number of connection holes, and then CNC machine tools are used to spot-face the connection holes, and finally workers use pneumatic tools to spot-face the holes Rivets are driven inside to realize the reliable connection between the skin an...

AI Technical Summary

Problems solved by technology

[0004] (1) The contact probe of the three-coordinate measuring machine first needs to be lowered into the connection hole for measurement according to the theoretical hole position of the connection hole. Due to the position error introduced by the artificial hole, the probe is very likely to collide with the skin surface during the descent process. serious accident;

[0005] (2) After the measurement of the part, it is transferred to the CNC machine tool for processing. Due to the weak rigidity of the skin itself and repeated clamping errors, the position of the connecting hole will shift again, resulting in the coaxiality error of the spot facing and the connecting hole

[0006] (3) The three-coordinate measuring machine is a precision equipment, its feed speed is low, and the number of measuring points for a single hole is not less than 8

[0008] (1) The diameter of the hole is only a few millimeters, and the harsh lighting conditions at the production site seriously reduce the quality of the photo;

[0009] (2) Using the camera alone to take pictures can only get the detection results in the plane, but ignores the spatial information of the hole position

For example, the photo contains the information of the hole in the XY plane, but at the same time loses the Z coordinate information of the surface of the hole;

[0010] (3) At present, the non-contact detection equipment is large in size, and it is difficult to integrate with the spindle of the machine tool, which is not conducive to the rapid detection of a large number of hole systems

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